Electrochemical bidirectional micropump for processing of liquid plugs

Author

Obata, H. ; Kuji, T. ; Yokokawa, M. ; Suzuki, H.

Author_Institution

Grad. Sch. of Pure & Appl. Sci., Univ. of Tsukuba, Tsukuba, Japan

fYear

2015

fDate

21-25 June 2015

Firstpage

1786

Lastpage

1789

Abstract

An electrochemical micropump based on the production and shrinkage of hydrogen bubbles was fabricated. Bidirectional movement of a solution in a microfluidic channel was realized by producing and shrinking hydrogen bubbles on a platinum black electrode. The pump could also be operated autonomously by changing the mixed potential, which was realized by coupling the reduction and oxidation of protons/hydrogen with the oxidation (dissolution) of zinc and deposition of silver on electrodes connected to the platinum black electrode. The pump could withdraw an external solution through a microneedle. Also, two integrated pumps could manipulate solution plugs in microfabricated flow channels.

Keywords

bubbles; dissolving; electrochemical devices; electrodes; microchannel flow; micropumps; oxidation; reduction (chemical); deposition; dissolution; electrochemical bidirectional micropump; hydrogen bubbles; liquid plugs; microfluidic channel; microneedle; mixed potential; oxidation; platinum black electrode; Electric potential; Electrodes; Hydrogen; Micropumps; Platinum; Plugs; Zinc; Micropump; autonomous microfluidics; bidirectional pumping; hydrogen bubble; mixed potential;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), 2015 Transducers - 2015 18th International Conference on

Conference_Location

Anchorage, AK

Type

conf

DOI

10.1109/TRANSDUCERS.2015.7181293

Filename

7181293